# 八，打印五子棋
size = int(input("请输入棋盘大小:"))
for i in range(size):
    for j in range(size):
        if i==0 and j==0:
            print("┌-",end="")
        elif i==0 and j==size-1:
            print("-┐",end="")
        elif i==size-1 and j==0:
            print("└-",end="")
        elif i ==size-1 and j==size-1:
            print("-┘",end="")
        elif j ==0:
            print("├-",end="")
        elif i==size-1:
            print("-┴-",end="")
        elif j==size-1:
            print("-┤",end="")
        elif i==0:
            print("-┬-",end="")
        else:
            print("-┼-",end="")
    print("")